EP4473245B1 - Vitre composite pourvue de source lumineuse - Google Patents

Vitre composite pourvue de source lumineuse

Info

Publication number
EP4473245B1
EP4473245B1 EP23701129.1A EP23701129A EP4473245B1 EP 4473245 B1 EP4473245 B1 EP 4473245B1 EP 23701129 A EP23701129 A EP 23701129A EP 4473245 B1 EP4473245 B1 EP 4473245B1
Authority
EP
European Patent Office
Prior art keywords
pane
functional element
laminated
light
light source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP23701129.1A
Other languages
German (de)
English (en)
Other versions
EP4473245A1 (fr
Inventor
Jefferson DO ROSARIO
Achim ZEICHNER
Matthias Mandelartz
Pierre SARKISSIAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Sekurit France SAS
Original Assignee
Saint Gobain Sekurit France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain Sekurit France SAS filed Critical Saint Gobain Sekurit France SAS
Publication of EP4473245A1 publication Critical patent/EP4473245A1/fr
Application granted granted Critical
Publication of EP4473245B1 publication Critical patent/EP4473245B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/006—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to produce indicia, symbols, texts or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B32B17/10183—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer being not continuous, e.g. in edge regions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10293—Edge features, e.g. inserts or holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/10467—Variable transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/10467—Variable transmission
    • B32B17/10495—Variable transmission optoelectronic, i.e. optical valve
    • B32B17/10504—Liquid crystal layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/10467—Variable transmission
    • B32B17/10495—Variable transmission optoelectronic, i.e. optical valve
    • B32B17/10513—Electrochromic layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/10467—Variable transmission
    • B32B17/10495—Variable transmission optoelectronic, i.e. optical valve
    • B32B17/10532—Suspended particle layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10541—Functional features of the laminated safety glass or glazing comprising a light source or a light guide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10651—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising colorants, e.g. dyes or pigments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10761—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer containing vinyl acetal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
    • B32B17/10935—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin as a preformed layer, e.g. formed by extrusion
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles

Definitions

  • the invention relates to a composite pane with a light source, a method for its production and its use.
  • Composite panes with electrically controllable optical properties are known as such. They comprise composite panes equipped with functional elements whose optical properties can be changed by an applied electrical voltage.
  • the functional elements are planar structures with electrically controllable optical properties of an active layer. This means that the optical properties of the active layer, and in particular its transparency, scattering behavior, or luminosity, can be controlled by an electrical voltage.
  • Optically controllable functional elements such as SPD, PDLC, or electrochromic functional elements
  • the active layer arranged between two surface electrodes that serve to apply a voltage to control the active layer.
  • the two surface electrodes are arranged between two carrier films, typically made of PET.
  • commercially available multilayer films are also covered on both sides with a protective film made of polypropylene or polyethylene, which serves to protect the carrier films from soiling or scratches.
  • the electro-optical functional element is cut out of the multilayer film in the desired size and shape and inserted between the films of an intermediate layer, by means of which two glass panes are laminated together to form a laminated pane.
  • a typical application is windshields with electrically adjustable sun visors, which, for example, are made of DE102013001334A1 , DE102005049081B3 , DE102005007427A1 , DE202020005499U1 and DE102007027296A1 are known.
  • a composite pane can also comprise other elements that have optically controllable properties.
  • lighting effects can be created in a composite pane that is part of the composite pane using a light source, a light guide, and an output element.
  • the light from the light source is coupled into the light guide, where it remains in the light guide by utilizing the effect of total internal reflection until it hits the output element.
  • the light is emitted from the light guide at the output element, creating a locally limited glow.
  • the light guide and the output element can be laminated within the composite pane.
  • the light guide represents the inner pane of the composite pane, for example, and the output element is created by locally limited roughening of a surface of the inner pane.
  • the light source is usually an LED module, which is positioned on the edge or in a hole in the light guide in order to optimally couple the light into the light guide.
  • LED module which is positioned on the edge or in a hole in the light guide in order to optimally couple the light into the light guide.
  • the US10139080B2 discloses a roof pane with an inner pane, an outer pane, a thermoplastic intermediate layer, and an SPD element.
  • Light-emitting diodes are laminated between the outer pane and the inner pane, as well as within the thermoplastic intermediate layer. These LEDs can be switched on and off via an electrical connection.
  • the SPD element is positioned closer to the exterior environment than the LEDs in the roof pane. As a result, the SPD element, when darkened, blocks the escape of light from the diodes into the exterior environment. No light coupling is shown; the LEDs radiate light through the inner pane into the vehicle interior.
  • the US2019255812A1 discloses a composite pane with a laminated PDLC element. No light source for coupling in light or an output element for coupling out light is disclosed.
  • the object of the present invention is to provide an improved composite pane with a light source and a functional element with electrically controllable optical properties, wherein preferably disturbing and undesired light effects, which arise from the functional element in interaction with coupled-in visible light, are to be reduced or completely avoided.
  • the composite pane according to the invention with a light source comprises at least one outer pane and one inner pane, a first thermoplastic film, a functional element, a darkened layer and a decoupling element.
  • the first thermoplastic film is arranged between the outer pane and the inner pane.
  • the functional element and the darkened layer are preferably arranged between the outer pane and the inner pane.
  • the functional element has electrically controllable optical properties.
  • the functional element is preferably arranged in a see-through area of the composite pane.
  • the decoupling element is provided for decoupling light from the inner pane.
  • the light source is arranged on a side edge of the inner pane or in a recess of the inner pane.
  • the light source is provided for coupling light into the inner pane.
  • the decoupling element is provided for
  • the darkened layer has at least one opaque region with a light transmittance of less than or equal to 50%.
  • the opaque region of the darkened layer is present at least in the region between the light source and the functional element. This means that the opaque region of the darkened layer extends at least over the entire area between the light source and the functional element.
  • the inner pane has an outer surface facing the first thermoplastic film and an interior surface facing away from the first thermoplastic film.
  • the outcoupling element preferably couples out the light coupled in by the light source predominantly via the interior surface of the inner pane.
  • the light from the light source cannot be 100% coupled into the inner pane via total internal reflection. Part of the light transmits through the interior surface of the inner pane and the exterior surface of the inner pane. This part of the light is reflected by the outer pane and at least partially hits the functional element. If light emitted by the light source hits the functional element, this results in an optically visible glow, which increases in intensity the closer the affected area of the functional element is to the light source.
  • the opaque area largely prevents the light emitted by the light source from hitting the functional element. The opaque area absorbs the light that escapes through the exterior surface of the inner pane, thereby largely preventing the creation of an optically visible glow.
  • the outer pane has an outer surface facing away from the first thermoplastic film, which is also the outer surface of the composite pane.
  • the outer pane also has an interior-side surface facing the first thermoplastic film.
  • the interior-side surface of the inner pane is also the inner surface of the composite pane.
  • the composite pane is intended to separate an outer environment from an interior, preferably a vehicle interior.
  • the outer surface of the outer pane is intended to face the outer environment, and the interior-side surface of the inner pane is intended to face the interior.
  • the composite pane has a circumferential side edge, which preferably comprises an upper edge and a lower edge, as well as two edges running between them, a left edge and a right edge.
  • the upper edge refers to the edge intended to face upwards in the installed position.
  • the lower edge refers to the edge intended to face downwards in the installed position.
  • the upper edge is often referred to as the roof edge, and the lower edge is referred to as the engine edge.
  • the darkened layer is arranged between the functional element and the inner pane, and the first thermoplastic film is arranged between the functional element and the outer pane.
  • the opaque region of the darkened layer coincides with at least one edge region of the functional element closest to the light source.
  • the opaque region therefore extends over the entire area between the light source and the functional element and one edge region of the functional element.
  • the edge region of the functional element closest to the light source which overlaps with the opaque region when viewed through the composite pane, is preferably strip-shaped.
  • the width of this edge region is preferably at least 1 cm, particularly preferably at least 3 cm, and especially at least 5 cm.
  • “Width” in the context of the invention refers to the extent perpendicular to the direction of extension.
  • the composite pane preferably comprises a second transparent thermoplastic film, which particularly preferably has the same thickness as the functional element or a thickness that differs by up to 10% from the thickness of the functional element.
  • the second thermoplastic film is arranged at least partially in a frame-like manner around the functional element.
  • the second thermoplastic film is designed in a frame-like manner with a recess into which the functional element is inserted.
  • partially arranged in a frame-like manner around the functional element it can be meant, for example, that the functional element is connected to a section of the circumferential side edge of the The composite pane is flush with the glass, so that the second thermoplastic film only surrounds the functional element outside this section. Due to the second thermoplastic film, which is at least partially arranged around the functional element, differences in the thickness of the composite pane can be avoided, which in turn increases the stability of the composite pane.
  • the opaque region of the darkened layer has a light transmittance of less than 10% and preferably less than 1%.
  • the darkened layer is particularly preferably formed as a thermoplastic film with the opaque region and a transparent region.
  • the transparent region of the darkened layer has a light transmittance of 50% or higher.
  • the darkened layer preferably extends over the entire surface of the composite pane and, together with the first thermoplastic film and optionally with the second thermoplastic film in the laminated composite pane, forms a thermoplastic intermediate layer.
  • the functional element is embedded within the thermoplastic intermediate layer, with the first thermoplastic film preferably being arranged between the outer pane and the functional element, and the darkened layer preferably being arranged between the functional element and the inner pane.
  • the darkened layer is preferably made of the same material as the first thermoplastic film, with the opaque region of the darkened layer being achieved by coloring or tinting in certain areas.
  • This embodiment is particularly advantageous because, in addition to solving the technical problem, the darkened layer is also used to bond the outer pane, the functional element and the inner pane, thereby reducing material costs and process steps.
  • the entire darkened layer has a light transmittance of less than 10% and preferably less than 1%.
  • the darkened layer preferably extends over no more than 40%, preferably no more than 30% and particularly preferably no more than 20% of the surface of the composite pane.
  • a transparent third thermoplastic film is arranged offset from the darkened layer in the surface plane of the composite pane, so that the transparent thermoplastic film and the darkened layer, viewed together, extend over the entire surface of the composite pane.
  • the darkened layer therefore extends over a region of the composite pane that makes up no more than 40% of the surface area of the composite pane; the third thermoplastic film extends over the remaining surface area of the composite pane.
  • the first thermoplastic film, the optionally second thermoplastic film, the third thermoplastic film, and the darkened layer form a thermoplastic intermediate layer when the composite pane is laminated.
  • the functional element is embedded within the thermoplastic intermediate layer, with the first thermoplastic film preferably being arranged between the outer pane and the functional element, and the darkened layer and the third thermoplastic film preferably being arranged between the functional element and the inner pane.
  • the darkened layer preferably consists of the same material as the first thermoplastic film and the third thermoplastic film, with the low light transmittance of the darkened layer being achieved by coloring or tinting. This embodiment is particularly advantageous because, in addition to solving the technical problem, the darkened layer is also used to bond the outer pane, the functional element, and the inner pane, thereby reducing material costs and process steps.
  • something is “transparent” if its light transmittance is more than 70%, especially more than 75%.
  • "Opaque” for the purposes of the invention means a light transmittance of less than 50%, particularly preferably less than 10%, and especially less than 1%.
  • the light transmittance can be determined according to ISO 9050 (2003-08) for building glazing.
  • the darkened layer is applied to the outer surface of the inner pane.
  • the darkened layer is preferably formed as a screen print, particularly preferably a black one.
  • the darkened layer is formed, for example, from an enamel containing glass frits and a pigment, in particular a black pigment.
  • the enamel is typically applied using a screen printing process and fired. This has the advantage that no additional film or layer is required to reduce the halo effect. This can save material costs.
  • the composite pane can be provided with an opaque black print, particularly in a peripheral edge area, as is common in the automotive sector, particularly for windshields, rear windows, and roof windows.
  • the black print is typically formed from an enamel containing glass frits and a pigment, in particular black pigment.
  • the printing ink is typically applied using a screen printing process and baked in.
  • Such a black print is applied to at least one of the pane surfaces, preferably the interior-facing surface of the outer pane and/or the inner pane.
  • the cover print preferably surrounds a central see-through area in a frame-like manner and serves in particular to protect the adhesive, with which the composite pane can be bonded, for example, to a vehicle body, from UV radiation.
  • the opaque black print preferably has a thickness of at least 10 ⁇ m and a maximum of 25 ⁇ m. At such thicknesses, the black print is opaque without compromising the stability of the pane.
  • the darkened layer is a tinted or colored thermoplastic film and has a light transmittance of at least 15% and at most 50%.
  • the darkened layer preferably extends over the entire surface of the laminated pane.
  • the darkened layer is preferably arranged between the functional element and the inner pane. The extension of the darkened layer over the entire laminated pane effectively reduces the halo effect. It therefore does not matter where exactly the light transmits beyond the outer surface of the inner pane.
  • the darkened layer has a high light absorption across the entire surface of the laminated pane.
  • the first thermoplastic film, the optionally present second thermoplastic film, and the optionally present third thermoplastic film are preferably formed as thermoplastic composite films. They are preferably based on ethylene-vinyl acetate (EVA), polyvinyl butyral (PVB), or polyurethane (PU), or mixtures or copolymers or derivatives thereof, particularly preferably based on polyvinyl butyral (PVB), and additionally contain additives known to those skilled in the art, such as plasticizers.
  • the thermoplastic composite films preferably contain at least one plasticizer.
  • the thermoplastic intermediate layer can be formed by only the first thermoplastic film or by more than one film.
  • the thermoplastic intermediate layer can be formed by one or more thermoplastic films arranged one above the other, wherein the thickness of the thermoplastic intermediate layer after lamination of the layer stack is preferably from 0.25 mm to 1 mm, typically 0.38 mm or 0.76 mm.
  • the thermoplastic intermediate layer can also be formed from a film that is colored or tinted in certain areas.
  • the first thermoplastic film or multiple thermoplastic films can also be functional thermoplastic films, in particular films with acoustically dampening properties, a film that reflects infrared radiation, an infrared radiation-absorbing film and/or a UV radiation-absorbing film.
  • the first, the optionally second and/or the optionally third thermoplastic film can also be band filter films.
  • the darkened layer can also be part of the thermoplastic intermediate layer if it is formed as a thermoplastic film.
  • the darkened layer is formed as a polymeric film, preferably a thermoplastic film.
  • the darkened layer is preferably based on ethylene vinyl acetate (EVA), polyethylene terephthalate (PET), polyvinyl butyral (PVB), or polyurethane (PU), or mixtures or copolymers or derivatives thereof, particularly preferably based on polyvinyl butyral (PVB), and additionally contains additives known to those skilled in the art, such as plasticizers.
  • something is "based" on a polymeric material, it consists predominantly of this material, i.e., at least 50%, preferably at least 60%, and especially at least 70%. It may therefore also contain other materials such as stabilizers or plasticizers.
  • the functional element is a PDLC functional element ( polymer dispersed liquid crystal ) .
  • the PDLC functional element contains liquid crystals which are embedded in a polymer matrix. If no voltage is applied to the PDLC functional element, the liquid crystals are aligned in a disordered manner, which leads to a strong scattering of the light passing through the active layer (translucency). If a voltage is applied to the functional element, the liquid crystals align themselves in a common direction and the transmission of light through the functional element is increased (transparency). However, it is also possible for the liquid crystals to be ordered in a voltage-free state and for the liquid crystals to be correspondingly disordered when a voltage is applied.
  • the functional element is an SPD functional element ( suspended particle device ).
  • the SPD functional element contains suspended particles.
  • the suspended particles change the optical state of the functional element through the absorption of light by applying a voltage.
  • SPD functional elements therefore have switching states with transparent and opaque optical properties, as well as intermediate states between transparency and opacity.
  • alternating voltage the effective value of the alternating voltage, not the instantaneous voltage
  • the functional element is an electrochromic functional element.
  • the transmission of visible light through the functional element depends on the degree of ion storage.
  • the ions are released, for example, through an ion storage layer and stored in an electrochromic layer.
  • the transmission can be influenced by the voltage applied to the functional element, which causes the ions to migrate.
  • Suitable electrochromic layers preferably contain at least tungsten oxide or vanadium oxide.
  • the control unit is preferably not equipped with an inverter, and a direct voltage is applied to the functional element.
  • a direct voltage converter for achieving voltages in the range of 1 V to 50 V and preferably 10 V to 42 V can, however, be a component of the control unit as required.
  • the composite pane comprises an emissivity-reducing coating.
  • the emissivity-reducing coating is preferably applied to the interior-facing surface of the inner pane.
  • the emissivity-reducing coating is a thermal radiation-reflecting coating. Such a coating is often also referred to as a low-E coating or Low emissivity coating. Its function is to prevent heat radiation into the interior (thermal radiation of the pane itself) and also to prevent heat radiation from the interior.
  • Emissivity in the context of the invention, is understood to be the normal emissivity at 283 K according to the standard EN 12898.
  • Emissivity-reducing coatings, which the laminated pane according to the invention can have, are known to the person skilled in the art. These can be, for example, as in WO2018206236A1 be openly trained.
  • the composite pane comprises an infrared protective layer, which is preferably arranged or applied on the interior surface of the outer pane, the exterior surface of the inner pane, or between the outer pane and the inner pane.
  • the infrared protective layer blocks infrared radiation and allows visible light to pass through.
  • blocking infrared radiation means that the infrared protective layer at least partially reflects and/or absorbs infrared radiation.
  • the infrared protective layer particularly preferably reflects infrared radiation. The reflection of the infrared radiation has the advantage that the composite pane does not heat up as much.
  • Infrared protective layers that the composite pane can have are known to the person skilled in the art. These can be, for example, as in WO2019120850A1 be openly trained.
  • the outer pane and the inner pane are preferably made of transparent glass, in particular soda-lime glass, which is common for window panes.
  • the panes can also be made of other types of glass (e.g., borosilicate glass, quartz glass, aluminosilicate glass) or transparent plastics (e.g., polymethyl methacrylate or polycarbonate).
  • the thickness of the outer pane and the inner pane can vary widely. Preferably, panes with a thickness in the range of 0.8 mm to 5 mm, preferably 1.4 mm to 2.5 mm, are used, for example, those with the standard thicknesses of 1.6 mm or 2.1 mm.
  • the outer pane and the inner panes can be untempered, partially tempered, or tempered independently of one another. If at least one of the panes is to be tempered, this can be thermally or chemically tempered.
  • the inner pane can have a recess in which the light source can be arranged.
  • the inner pane is particularly preferably made of soda-lime glass with an iron oxide content of no more than 1%. This low ice oxide content of the inner pane makes the inner pane particularly clear and uncoloured.
  • the inner pane is particularly well suited as an optical fiber, i.e. for coupling in light.
  • the light from the light source is coupled into the inner pane, with the light source being suitably positioned relative to the pane for this purpose.
  • the light source is preferably arranged laterally to the inner pane, i.e., on its side edge, which enables effective coupling of light into the pane. Equally preferred is the arrangement of the light source in a recess or opening in the inner pane, which also enables effective coupling of light into the inner pane.
  • the light source is preferably firmly connected to the inner pane by means of a housing. The light coupled into the inner pane is totally reflected in the pane until it is coupled out of the pane at the coupling-out element.
  • the light emitted by the light source is preferably visible light, i.e., light in a wavelength range from 380 nm to 780 nm.
  • the light source can emit infrared or ultraviolet light, which is preferably converted into visible light by fluorescent or luminescent particles, preferably as a component of the coupling-out element.
  • the light source preferably contains or consists of a light-emitting diode (LED), preferably at least one organic light-emitting diode (OLED), at least one laser diode, at least one incandescent lamp and/or at least one gas discharge lamp.
  • LED light-emitting diode
  • OLED organic light-emitting diode
  • the coupling-out element is intended to at least partially couple the light coupled into the inner pane by the light source into the interior and/or the external environment.
  • the coupling-out element couples the light into an interior, for example, a vehicle interior, via the interior-side surface of the inner pane.
  • the coupling-out element can be arranged within the see-through area of the composite pane or outside the see-through area.
  • see-through area refers to an area intended for viewing through the composite pane.
  • the see-through area does not have any opaque layers, such as black prints, which prevent viewing.
  • the coupling-out element is suitable for coupling out at least part of the light guided in the inner pane through scattering, reflection, refraction, or diffraction.
  • the outcoupling element is applied to the outer surface or the inner surface of the inner pane.
  • the outcoupling element is preferably introduced into the inner surface and/or the outer surface of the inner pane by laser structuring, mechanical structuring such as sandblasting, and/or by etching.
  • the outcoupling element can be materially bonded to the inner surface and/or the outer surface of the inner pane, preferably by printing or gluing on an ink, a paste, or particles, particularly preferably light-scattering, light-refracting, or light-reflecting particles. This form of outcoupling element is preferred because it can be implemented simply and easily even after the inner pane has been manufactured.
  • the decoupling element is arranged between the thermoplastic intermediate layer and the inner pane.
  • the decoupling element is preferably a plastic film or plastic plate. This protects the decoupling element from external, harmful influences.
  • the decoupling element can also be printed on the thermoplastic intermediate layer.
  • the outcoupling element is arranged within the inner pane.
  • the outcoupling element is preferably introduced during the manufacture of the inner pane, particularly preferably by artificially creating optical defects.
  • the lamination of the layer stack occurs under the influence of heat, vacuum, and/or pressure, whereby the individual layers are bonded (laminated) to one another by at least one thermoplastic film.
  • Known processes can be used to produce a composite pane. For example, so-called autoclave processes can be carried out at an elevated pressure of approximately 10 bar to 15 bar and temperatures of 130°C to 145°C for approximately 2 hours.
  • Known vacuum bag or vacuum ring processes for example, operate at approximately 200 mbar and 130°C to 145°C.
  • the layer stack can also be pressed into a composite pane in a calender between at least one pair of rollers. Systems of this type are known for the production of composite panes and typically have at least one heating tunnel upstream of a pressing unit.
  • the temperature during the pressing process is, for example, between 40°C and 150°C. Combinations of calender and autoclave processes have proven particularly effective in practice. Alternatively, vacuum laminators can be used. These consist of one or more heatable and evacuatable chambers in which the outer pane and the inner pane can be laminated within, for example, about 60 minutes at reduced pressures of 0.01 mbar to 800 mbar and temperatures of 80°C to 170°C.
  • the composite pane according to the invention can, for example, be the roof pane, windscreen, side window or rear window of a vehicle or another It can be automotive glazing, for example, a partition in a vehicle, preferably a rail vehicle or a bus.
  • the laminated pane can be architectural glazing, for example, in the exterior facade of a building or a partition inside a building, or a built-in component in furniture or appliances.
  • a further aspect of the invention encompasses the use of the composite pane according to the invention in means of transport for land, air, or water traffic, preferably in motor vehicles, for example as a windshield, rear window, side windows, and/or glass roof, particularly preferably as a roof pane.
  • the composite pane can be used as a functional and/or decorative individual piece and as a built-in component in furniture, appliances, and buildings.
  • Figure 1 and Figure 1a show different aspects of an embodiment of a composite pane 100 according to the invention.
  • Figure 1 a shows a plan view of the composite pane 100 according to the invention and
  • Figure 1a shows a cross-sectional view of the composite pane 100 according to the invention.
  • the cross-sectional view of Figure 1a corresponds to the section line AA' of the composite pane 100, as shown in Figure 1 is indicated.
  • a light source 7 is arranged in a recess of the composite pane 100.
  • the composite pane 100 is, for example, a roof pane of a vehicle and the composite pane 100 is installed in a roof of a vehicle.
  • the composite pane 100 comprises an outer pane 1 and an inner pane 2, which are connected to one another by a flat intermediate layer 10.
  • the outer pane 1 has an outer surface I facing away from the intermediate layer 10 and an interior-side surface II facing the intermediate layer 10.
  • the inner pane 2 has an interior-side surface IV facing away from the intermediate layer 10 and an exterior surface III facing the intermediate layer 10.
  • the interior-side surface IV of the inner pane 2 is simultaneously the surface of the composite pane 100, which faces the vehicle interior and the outside surface I of the outer pane 1 is simultaneously the surface of the laminated pane 100 which faces the outside environment.
  • the outer pane 1 consists, for example, of slightly tinted soda-lime glass with a thickness of 2.1 mm.
  • the inner pane 2 consists, for example, of soda-lime glass with an iron oxide content of a maximum of 1%.
  • the inner pane 2 has, for example, a thickness of 1.6 mm. Due to its low iron oxide content, the inner pane 2 has a very slight color tint and is significantly more colorless than soda-lime glass usually produced for the vehicle sector. Due to its colorlessness, the inner pane 2 has good properties as a light guide.
  • the intermediate layer comprises a first thermoplastic film 10.1, a second thermoplastic film 10.2 and a darkened layer 6.
  • the first thermoplastic film 10.1 is arranged flat on the interior-side surface II of the outer pane 1, wherein the darkened layer 6 is arranged flat on the exterior-side surface III of the inner pane 2.
  • the darkened layer 6 extends, among other things, over the entire area 8 of the composite pane 100 located between the light source 7 and the functional element 4 and over an edge area 12 of the functional element 4 closest to the light source 7 (the edge area 12 of the functional element 4 is Figure 4 and the Figure 5 shown).
  • the second thermoplastic film 10.2 is arranged in a frame-like manner, similar to a passpartout, around a functional element 4, wherein the second thermoplastic film 10.2 and the functional element 4 are arranged between the first thermoplastic film 10.1 and the darkened layer 6.
  • the first and second thermoplastic films 10.1, 10.2 as well as the darkened layer 6 are made of the same thermoplastic material, for example PVB, so that after lamination to form the composite pane 100, they fuse together to form the intermediate layer 10.
  • the intermediate layer 10 has, for example, a thickness of 0.76 mm.
  • an opaque black print 13 is applied in a frame-like manner in the edge region of the inner pane 2.
  • the black print 13 runs along the peripheral edge of the inner pane 2 and prevents visibility through the laminated pane 100 in the area in which it is applied.
  • the black print 13 does not have the same width in all areas; however, it is also possible for the black print 13 to have the same width everywhere.
  • “Width” refers to In the sense of the invention, the extension perpendicular to the direction of extension is meant.
  • the black print 13 overlaps, when viewed through the composite pane 100, with a peripheral edge region of the functional element 4.
  • the overlapped peripheral edge region of the functional element 4 has a width of 2 cm, for example.
  • the partial overlap of the functional element 4 with the black print 13 serves the purpose of concealing the unsightly edge of the functional element for vehicle occupants.
  • a further black print 13 can also be applied in a peripheral edge region on the outside surface I or the inside surface II of the outer pane 1 (not shown here).
  • the functional element 4 is, for example, a PDLC functional element, which is connected by a conduction element, for example a flat conductor, to a control unit located outside the composite pane 100 (not shown here).
  • the functional element 4 can change its optical state via an applied alternating voltage (effective value of the alternating voltage), which can be output by the control unit.
  • the functional element 4 can, for example, switch between two states, a translucent state (i.e., a state with high light scattering) and a transparent state, using the applied voltage.
  • the translucent state is preferably achieved when the functional element 4 is voltage-free, i.e., no electrical voltage is applied.
  • the transparent state is preferably achieved when an electrical voltage is applied to the functional element 4 by the control unit. States between maximum transparency of the functional element 4 and maximum translucency of the functional element 4 are also possible.
  • a light source 7 is arranged in a recess 9 of the inner pane 2.
  • the recess 7 is arranged in an edge region of the composite pane 100 and, when viewed from above onto the interior-side surface IV of the inner pane, is located within the area to which the black print 13 is applied.
  • the light source 7 is, for example, an LED (light-emitting diode) arrangement.
  • the recess 9 of the inner pane 2 has, for example, a cylindrical shape and is only open on the interior-side surface IV of the inner pane 2.
  • the opening of the recess 9 can optionally be concealed (for example, by a black-colored and opaque film).
  • the light source 7 radiates the visible light 3 toward an outcoupling element 5, which is centrally mounted on the interior-side surface IV of the inner pane 2. Total reflection of the visible light 3 in the inner pane 2 occurs until the visible light 3 strikes the outcoupling element 5. In this case, the visible light 3 is coupled out of the inner pane 2 at this point and scattered outward, in particular toward the vehicle interior.
  • the coupling-out element 5 can be used to generate visible light patterns on the composite pane 100.
  • the coupling-out element is, for example, a light-diffusing coating, e.g., in the form of a screen-printed and baked paste, which was applied to the interior-side surface IV of the inner pane 2.
  • the coupling-out element forms, for example, the lettering "Saint-Gobain" as in Figure 1 is indicated.
  • the light 3 coupled into the inner pane 2 by the light source 7 does not transmit 100% under total internal reflection to the outcoupling element 5.
  • a small portion of the visible light 3 is already coupled out before striking the outcoupling element 5 and thus strikes, for example, the functional element 4.
  • the striking of the visible light 3 on the functional element 4 leads to a milky halo on the interior-side surface IV of the inner pane 2, which can be perceived by vehicle occupants as unpleasant or unaesthetic.
  • This halo effect decreases with the distance from the light source 7 and varies in intensity depending on the optical state of the functional element 4. In a translucent state of the functional element 4, the halo effect is more pronounced than in a transparent state.
  • FIG. 1a It can be seen in particular in a section Z of the functional element 4 that is visible from the vehicle interior and is located in spatial proximity to the light source 7.
  • Figure 1a and Figure 1b The problem is solved by arranging a darkened layer 6 between the functional element 4 and the inner pane 2.
  • the darkened layer 6 is, for example, tinted black and has a transmittance for visible light of 40%. Due to the tint of the darkened layer 6 and the reduced light transmission through the darkened layer 6, a large proportion of the diverted visible light 3 is absorbed by the darkened layer 6.
  • the halo effect in section Z of the functional element 4 can thereby be greatly reduced or even completely eliminated. This is a major advantage of the invention and was surprising to the inventors.
  • the Figure 1b shows an enlarged section of an edge area Y of the composite pane 100.
  • the enlarged edge area Y of the composite pane is in Figure 1a indicated.
  • the Figure 2 shows a plan view of the composite pane 100, wherein the light source 7 is not arranged in a recess 9, but by means of a housing 14 on a side edge 11 of the composite pane 100.
  • the Figures 3 to 6 show various embodiments of the invention in cross-sectional view.
  • the cross-sectional views of the Figures 3 to 6 correspond to the section line BB' of the composite pane 100, as shown in Figure 2 This means that the different embodiments of the Figures 3 to 6 are (schematically) optically identical in plan view of the composite pane 100.
  • the composite pane has 100 Figure 3 no recess 9 in the inner pane 2, and the light source 7 is attached to a side edge 11 of the inner pane 2 via a housing 14.
  • the light source 7 thus couples the visible light 3 emitted by it into the inner pane 2 via a side edge of the inner pane 2.
  • the composite pane has 100 Figure 4 no recess 9 in the inner pane 2 and the light source 7 is attached via a housing 14 to a side edge 11 of the inner pane 2.
  • the light source 7 couples the visible light 3 emitted by it into the inner pane 2 via a lateral edge of the inner pane 2.
  • the darkened layer 6 also extends only partially, for example 20%, over the surface of the composite pane 100.
  • a third transparent thermoplastic film 10.3 is arranged, which is located in the same plane as the darkened layer 6, i.e., when viewed through the composite pane 100, does not overlap with it.
  • the darkened layer 6 and the transparent third thermoplastic film 10.3, viewed together, extend over the entire surface of the composite pane 100.
  • the thermoplastic intermediate layer 10 forms thus consists of the first, the second, the third thermoplastic film and the darkened layer 6.
  • the coupling element 5 is different from Figure 1 and 1a not applied to the interior-side surface IV of the inner pane 2, but to the surface of the third thermoplastic film 10.3 facing the inner pane 2.
  • the darkened layer 6 extends over the entire area 8 of the composite pane 100 located between the light source 7 and the functional element 4 and over an edge area 12 of the functional element 4 closest to the light source 7.
  • the darkened layer 6 is completely concealed by the black print.
  • the darkened layer 6 has a light transmittance for visible light of less than 1% and is colored black. Due to the low transmittance of the darkened layer, a large portion of the coupled-in light 3 that is not transmitted under total reflection in the inner pane 2 to the output element 5 is absorbed by the darkened layer 6, so that the halo effect in the section Z of the functional element 4 facing the vehicle interior can be reduced or avoided.
  • the coupling element 5 is in Figure 5 unlike in Figure 1 and 1a not applied to the interior surface IV of the inner pane 2, but to the exterior surface III of the inner pane 2.
  • the light source 7 is identical to Figure 3 attached to a side edge 11 of the inner pane 2 by means of a housing 14.
  • the darkened layer 6 is applied in the form of an opaque black print on the outer surface III of the inner pane 2 and extends over the entire region 8 of the composite pane 100 located between the light source 7 and the functional element 4 and over the edge region 12 of the functional element 4 closest to the light source 7.
  • the intermediate layer 10 comprises, in addition to the first and second thermoplastic films 10.1, 10.2, a third transparent thermoplastic film 10.3, which is arranged between the functional element 4 and the inner pane 2 and extends over the entire surface of the composite pane 100.
  • the darkened layer 6 is arranged in a frame around the functional element 4 and has a light transmittance of less than 1%.
  • the intermediate layer 10 comprises the first thermoplastic film 10.1, the darkened layer 6 and a third thermoplastic film 10.3, wherein the third thermoplastic film is arranged between the functional element 4 and the inner pane 2.
  • the light source 7 is identical to Figure 3 attached to a side edge 11 of the inner pane 2 by means of a housing 14.
  • the frame-shaped, darkened layer 6 reduces the incidence of visible light 3 on the interior-side surface II of the outer pane 1.
  • a portion of the visible light 3 is reflected by the interior-side surface II of the outer pane 1.
  • This reflected light 3 strikes the functional element 4, which in turn can lead to the previously described halo effect in section Z of the functional element 4.
  • the frame-shaped layer 6 can reduce this reflection on the interior-side surface II of the outer pane 1.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Laminated Bodies (AREA)

Claims (15)

  1. Vitrage feuilleté (100) comportant une source de lumière, comprenant :
    - une vitre externe (1) et une vitre interne (2),
    - une première feuille thermoplastique (10.1) disposée entre la vitre externe (1) et la vitre interne (2),
    - un élément fonctionnel (4) comportant des propriétés optiques pouvant être commandées électriquement,
    - une couche assombrie (6),
    - un élément de découplage (5) pour le découplage de lumière (3) hors de la vitre interne (2) et
    - une source de lumière (7) pour le couplage de lumière (3) dans la vitre interne (2),
    dans lequel la couche assombrie (6) présente au moins une zone opaque comportant un degré de transmission de lumière inférieur ou égal à 50 % et la zone opaque est présente au moins dans la zone (8) entre la source de lumière (7) et l'élément fonctionnel (4)
    caractérisé en ce que
    la source de lumière est disposée sur un bord latéral de la vitre interne ou dans un évidement de la vitre interne.
  2. Vitrage feuilleté (100) selon la revendication 1, dans lequel au moins une zone marginale (12) de l'élément fonctionnel (4), la plus proche de la source de lumière (7), recouvre la zone opaque de la couche assombrie (6).
  3. Vitrage feuilleté (100) selon la revendication 2, dans lequel une seconde feuille thermoplastique (10.2) entoure partiellement ou totalement l'élément fonctionnel (4).
  4. Vitrage feuilleté (100) selon l'une des revendications 1 à 3, dans lequel au moins la zone opaque de la couche assombrie (6) présente un degré de transmission de lumière < 10 %, de préférence < 1 %.
  5. Vitrage feuilleté (100) selon l'une des revendications 1 à 4, dans lequel la couche assombrie (6) est réalisée sous forme de feuille thermoplastique comportant la zone opaque et une zone transparente, dans lequel la zone transparente de la couche assombrie présente un degré de transmission de lumière ≥ 50 %.
  6. Vitrage feuilleté (100) selon l'une des revendications 1 à 4, dans lequel l'ensemble de la couche assombrie (6) présente un degré de transmission de lumière < 10 %, de préférence < 1 %.
  7. Vitrage feuilleté (100) selon la revendication 6, dans lequel la couche assombrie (6) s'étend sur moins de 40 %, de préférence sur moins de 30 %, de manière particulièrement préférée sur moins de 20 % de la surface du vitrage feuilleté (100).
  8. Vitrage feuilleté (100) selon la revendication 6, dans lequel la couche assombrie (6) est appliquée sur une surface côté extérieur (III) de la vitre interne (2), tournée vers la vitre externe (1).
  9. Vitrage feuilleté (100) selon la revendication 8, dans lequel la couche assombrie (6) est réalisée sous forme de sérigraphie, de préférence noire.
  10. Vitrage feuilleté (100) selon la revendication 2 ou 3, dans lequel la couche assombrie (6) est une feuille thermoplastique teintée ou colorée et présente un degré de transmission de lumière d'au moins 15 % et d'au plus 50 %.
  11. Vitrage feuilleté (100) selon la revendication 10, dans lequel la couche assombrie (6) s'étend sur l'ensemble de la surface du vitrage feuilleté (100).
  12. Vitrage feuilleté (100) selon l'une des revendications 1 à 11, dans lequel l'élément fonctionnel (4) est un élément fonctionnel PDLC.
  13. Vitrage feuilleté (100) selon l'une des revendications 1 à 12, dans lequel un revêtement réduisant l'émissivité est appliqué sur une surface côté espace intérieur (IV) de la vitre interne (2), opposée à la vitre externe (1).
  14. Procédé de fabrication d'un vitrage feuilleté (100) comportant une source de lumière selon l'une des revendications 1 à 13, dans lequel
    (a) un empilement de couches, constitué de la vitre externe (1), de la première feuille thermoplastique (10.1), de l'élément fonctionnel (4), de la couche assombrie (6), de l'élément de découplage (5) et de la vitre interne (2), est fourni,
    (b) l'empilement de couches est stratifié pour former le vitrage feuilleté (100), et
    (c) la source de lumière (7) est disposée sur un bord latéral (11) de la vitre interne (2) ou dans un évidement (9) de la vitre interne (2).
  15. Utilisation d'un vitrage feuilleté (100) selon l'une des revendications 1 à 13 dans des moyens de locomotion pour la circulation terrestre, aérienne ou maritime, de préférence dans des véhicules automobiles, par exemple en tant que pare-brise, lunette arrière, vitre latérale et/ou toit en verre, de manière particulièrement préférée en tant que vitre de toit ou en tant que pièce unique fonctionnelle et/ou décorative et en tant que pièce à insérer dans des meubles, appareils et bâtiments.
EP23701129.1A 2022-01-31 2023-01-19 Vitre composite pourvue de source lumineuse Active EP4473245B1 (fr)

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EP22154153 2022-01-31
PCT/EP2023/051256 WO2023144007A1 (fr) 2022-01-31 2023-01-19 Feuille de verre composite dotée de source lumineuse

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US20250050624A1 (en) 2025-02-13
CN116897261A (zh) 2023-10-17
WO2023144007A1 (fr) 2023-08-03
EP4473245A1 (fr) 2024-12-11
US12311638B2 (en) 2025-05-27

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